but how many people now, or in the history of the world, "are" monogamous, and what does that tell us about humanity? do you know many people who reach adulthood, choose a mate, and remain with that person until death? Generally we have serial monogamy, or promiscuity to varying degrees. To complicate this, we insist on applying moral judgements to a biological function. Yes, I know, it's a little more complicated than that, but do acknowledge, that yes, in fact, it is complicated.